Pennsylvania Route 184 (PA 184, designated by the Pennsylvania Department of Transportation as SR 184) is an 9.68-mile-long (15.58 km) state highway located in Lycoming County in Pennsylvania. The western terminus is at PA 287 in Brookside. The eastern terminus is at Steam Mill Road, just after an interchange with U.S. Route 15 (US 15) in Steam Valley, a hamlet in Cogan House Township. The route was first designated as a spur from PA 84 in Brookside to US 15 via Cogan House Road. (PA 84 was renumbered to PA 287 in 1961.) Construction to upgrade US 15 several miles each way from its intersection with PA 184 to interstate standards included a new interchange with PA 184.

PA 184 begins at an intersection with PA 287 in the hamlet of Brookside. The route progresses to the northeast, heading through the rural areas of Cogan House Township. PA 184 continuously winds through the woods before forming a short eastward pattern after the intersection with Corgi Cabin Lane. The highway clears of the woods and enters fields. There, the route turns to the northeast at an intersection with Harman Road, a dead-end street to a local farm. PA 184 passes a large patch of woods to the east and enters the hamlet of White Pine. In White Pine, the highway passes some residences and intersects with Lick Run Road, where the route makes an abrupt turn to the east through farms.

At the intersection with Campbell Road, PA 184 turns to the north along the right-of-way of Campbell Road, while the original eastward route continues as Cogan House Road. Farms continue as the scenery for a couple miles as the highway heads north into the hamlet of Beech Grove. In Beech Grove, PA 184 makes several curves before heading eastward until the intersection with Taylor Road, where the highway turns to the northeast and enters the hamlet of Steam Valley. Through Steam Valley, PA 184 returns to the woods and starts passing numerous residences before entering the interchange with US 15 (Appalachian Thruway). Midway through the interchange, the road reaches the northbound on-off ramps, where PA 184 continues north past a parking lot and terminates at Steam Mill Road.